Drill.



W. G. WHITNEY.

DRILL.

APPLICATION FILED JAN. 2, 1909.

Patented Nov. 2, 1909.

.2 SHEETS-SHEET 1.

INVENTOR WITNESSES ATTORNEY W. G. WHITNEY.

DRILL.

' APPLICATION TILED JAN. 2, 1909. 938,534.

Patented Nov. 2, 1909.

2 SHEETS-SHEET 2.

WITNESSES llVl/E/VTOR, Z7 75%; 7 6Z- a w, l W on. Pmwutmmmm. um. 9. c.

UNITED STATES "ATNr orrio.

WILLIAM c. WHITNEY, or HIGHLAND FALLS, NEW YORK, ASSIGNOR T HIGHLANDFALLS MANUFACTURING COMPANY, or HIGHLAND FALLS, NEW YORK, A CORPO-RATION.

DRILL.

Application filed January 2, 1909.

To all whom it may concern:

Be it known that I, VILLIAM C. WHITNEY, a citizen of the United States,residing in Highland Falls, Orange county, New York, have invented acertain new and useful Improvement in Drill-Chucks; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompany ing drawings, and to characters of reference marked thereon,which form a part of this specification.

This invention relates to drill presses and.

the like and it consists in certain improvements in mechanism of thischaracter having for their object to make it possible to effect a changeof tools without stopping the rotation of the chuck and thus losingtime.

The invention will be found fully illustrated in the accompanyingdrawings, wherein,

Figure 1 shows my invention applied in connection with a drill-press ofknown construction, the view being in side elevation; Fig. 2 shows thebody of the chuck removed from the machine, the movable parts beingdetached; Fig. 3 shows the chuck, the chuck spindle and a chuckcontrolling part partly in side elevation and partly in section, thechuck being contracted; Fig. i is a view substantially similar to Fig. 2except that the chuck is expanded; Fig. is a side view of the tool; and,Fig. 6 a cross-sectional view thereof.

In one of two branches a a of the upright or standard a, having asuitable workholder a, slides vertically in the usual manner the sleeveb, the vertical movements of which are elfected from a lever 0 having amanually controlled pawl (Z adapted to engage a toothed wheel 0 on thesame shaft f with a pinion g which meshes with a rack it carried by thesleeve. The spindle 2', journaled in said sleeve and in a bearing j ofbranch a of the standard a, has splined thereon a pinion 7c meshing witha pinion Z fixed onthe oblique shaft m which is j ournaled in branches aa and carries a cone pulley a that is driven from the pulley 0 on themain shaft p, at differential speeds, by a belt Q surrounding pulley 0and interposed between the same and pulley a and adapted Specificationof Letters Patent.

Patented Nov. 2, 1909.

Serial No. 470,403.

to be shifted by the shipper-bar 7. It will be understood that in lieuof this known mechanism for securing both a rotary and a verticalmovement of the spindle any other mechanism may be employed. The lowerend of spindle 2' receives in the usual manner the shank s of the body tof the improved chuck which, in the present instance, has the opposedgrooves a connected by the bore '2; at the upper ends thereof andopening into the main axial bore of said chuck body, the latter borebeing adapted to receive the plug or stem 01 of the holder-member y ofthe tool, which latter preferably comprises said holder-member, the toolproper e and a set-screw 1 for securin the tool-proper in theholder-member. do not wish, however, to be limited to forming the toolin separate parts.

In holes 2 extending through the chuck body transversely of the groovesare arranged the pivoting pins 3 for jaws 4:, each having on the insideof the lower end thereof a rounded projection 5 and its upper endopposite the bore o, in which latter is arranged a spiral spring 6normally holding the jaws in the positions shown in Fig. 3. It may beremarked that the lower portion of the chuck-body, designated 7 in Fig.2, is enlarged, the grooves at extending somewhat above the shoulder 7formed at the upper end of the said enlarged portion 7 in the normalposition of the aws they are substantially sheathed or inclosed in thesegrooves. The upper end-portion of each jaw, however, protrudes slightlyabove said shoulder 7, and this portion of each jaw has a cam-face 8upwardly inclined to the surface of the reduced portion 10 forming theupper part of the chuck-body. A sleeve 9, substantially snugly fittingthe said reduced part 10 of the chuck-body and having a downwardly openannular chamber 11 to receive and substantially snugly fit the enlargedpart of said chuck-body, is vertically movable on the latter, restingwith the edge 12 thereof, formed where the top surface 13 of chamber 11and the surface of the bore 14 of the sleeve meet, in contact with thecam-faces 8, the part of said sleeve surrounding its chamber 11 actingto limit the outward movement of the upper ends of the jaws and theshoulder 7 in coact-ion with the surface 13 of chamber 11, acting tolimit the downward movement of said sleeve. An abutment to be engaged bythe sleeve 9, in the form of a fork 15, depends from and is bolted tothe branch a of the standard, the same straddling the spindle. Theholder-member y of the tool has the opposed notches 16 formed in itsplug m by boring the plug tangentially in opposite directions. The fork15 stands higher than the upward limit of movement of the spindle, underoperation from lever 0, when the latter is raised for the purpose ofclearing the tool from the work 17. When it is desired to open the jaws4 for the purpose of removing or inserting the tool, the lever c ismoved farther than usual so as to raise the chuck until the sleevethereof impinges against the fork 15; the sleeve being held fromcontinued upward movement with the chuck, its edge 12 wipes over thecam-faces 8 of the jaws and turns them on their pivots, so that theirlower or tool-holding ends open. On the return movement of lever 0,spring (5 forces the jaws to their normal positions, the camfaces 8 ofthe jaws acting to return the sleeve to its normal position.

Having thus fully described my invention, what I claim and desire tosecure by Letters Patent is:

The combination of the chuck-body hav ing a reduced upper part forming ashoul der with its lower or larger part, said chuckbody having avertical groove extending from below the shoulder to a point above thesame, a sleeve slidably arranged on the chuck body and snugly fittingthe upper part thereof and having a downwardly open chamber receivingthe upper portion of the lower part of the chuck-body, and a jaw pivotedbetween its ends in said groove and having its upper end protrudingabove said shoulder and formed in its protruding portion with a cam-faceupwardly inclined to the surface of the reduced part of the chuckbody,said sleeve resting on the cam-face of said jaw, substantially asdescribed.

In testimony that I claim the foregoing I have hereunto set my hand this14th day of December, 1908.

VILLIAM C. VHITNEY.

WVitnesses:

GEO. W. BLANCHARD, ANNA \V. BLANCHARD.

